A huge head that is perfectly symetrical. You could place a compass on the nose and it would be a perfect round circle.
People with this condition are known to be oxygen theives.
Also, people with this rare abnormality usually have brain capacity the size of a pea...No!!!

ps Roger agrees.

Dude, did you happen to see the big buffalo head on Barry last night.!!!! Fuck that thing is a one massive son of a bitch!!

Barry hit the wall with his big buffalo head and knocked the wall over, that mother fucker!!